Helpful to track to identify potential spikes in traffic. Memory: You should consider tracking the currently used and available memory for your IIS Worker Process.CPU %: The overall server and CPU usage for your IIS Worker Process should be monitored.All of these are monitored by default as part of Retrace’s application metrics monitoring. To simplify things a bit, I’m going to split the Performance Counters up between IIS and ASP.NET particular Performance Counters. NET.įor this guide on IIS performance monitoring, I’m going to review some of the top Performance Counters to monitor. There’s a wide array of them available between IIS, ASP.NET and. One of the advantages of using IIS as a web server is all of the metrics available via Windows Performance Counters. ![]() Recommended Performance Counters for IIS Monitoring In these scenarios, w3wp.exe may not be running, but there’s no actual problem, which is why you need to monitor it via IIS’s status and not just look for w3wp.exe to be running on your server. For example, Retrace monitors them by default.Īs a side note, app pools can be set to “Started” but may not actually be running as w3wp.exe if there is no traffic to your application. Most monitoring tools have a way to monitor IIS Application Pools. The Application Pool can get into a state where it won’t start at all.Ībove all, it’s important to always monitor that your IIS Application Pool is started. ![]() Other causes can be the user the app pool is running under, bad configurations, or other random problems. Sometimes an IIS Application Pool will crash and stop for any of several reasons.įor example, fatal application errors can kill the Application Pool. If you’ve been using IIS for a while, you’ve probably witnessed times when your application mysteriously stops working.Īfter some troubleshooting, you may find that your IIS Application Pool is stopped for some reason, which causes your site to go offline and your savvy users to check Downdetector to see if it’s you or them. Ensure Your IIS Application Pool Is Running In this example, we receive alerts if the number_of_nodes is not what we are expecting or if it doesn’t find an HTTP status of 200 OK. In addition, it can also help you track how long it takes to respond.įor instance, you could monitor for a 200 OK status or similarly, the request may return specific text that you know should be included in the response.Īs a side note, be careful not to rely on cached responses in your check since a 200 status response is cacheable.Īdditionally, monitoring IIS via a simple HTTP check is a good way to establish a basic SLA monitor, which you can use no matter how many servers you have, to know if your web application was online and available.įor example, one of the HTTP checks we use against Elasticsearch to help with monitoring it. One of the best and easiest things you can do is set up a simple HTTP check that runs every minute, which will give you a baseline to know if your site is up or down. The first thing you want to do is set up monitoring to ensure that your application is running. How to Monitor If Your IIS Application Is Running ![]() Advanced IIS performance monitoring for ASP.NET.Windows performance counters for IIS & ASP.NET.Ensuring your IIS Application is running.From Basics to Advanced IIS Performance Monitoring So, let’s get into this guide, where we’ll start with the basics and then move into more advanced ways to monitor IIS performance. Without monitoring IIS performance, you could end up leaving your site (and your users) hanging which, at best, will leave a bad taste in your user’s mouths and at worst, they’ll stop using your services. In addition, we’ll take a look at how to use an application performance management system to simplify monitoring IIS and get more advanced IIS performance monitoring for ASP.NET applications. Need help on how to monitor IIS? This guide covers the basics, including HTTP ping checks, IIS Application Pools, and important Windows Performance Counters.
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